General and dental pathology with special reference to etiology and pathologic anatomy; a treatise for students and practitioners . ntsassume the position of branches to the main stem; hence all thatcan be stated definitely at present is that organisms belonging toone or the other of these groups have been found in a causalrelation in abscesses of the brain, in lesions of the lungs resem- PATHOLOGY OF INFECTIOUS DISEASES 1*1 bling tuberculosis very closely, and in other Locations. Mos1 ob-servers, however, are inclined to regard the pathogenic forms asbelonging to the Mocardia (or Streptothric
General and dental pathology with special reference to etiology and pathologic anatomy; a treatise for students and practitioners . ntsassume the position of branches to the main stem; hence all thatcan be stated definitely at present is that organisms belonging toone or the other of these groups have been found in a causalrelation in abscesses of the brain, in lesions of the lungs resem- PATHOLOGY OF INFECTIOUS DISEASES 1*1 bling tuberculosis very closely, and in other Locations. Mos1 ob-servers, however, are inclined to regard the pathogenic forms asbelonging to the Mocardia (or Streptothrices), while the Clado-thrices are believed to be harmless saprophytes. Actinomycosis This is a chronic infectious disease due to the Actinomycesbovis. In cattle the lower jaw is principally affected (lumpyjaw), less frequently the upper jaw, tissues of the neck, thetongue (wooden tongue) and rarely other parts. In man thedisease occurs occasionally, affecting the mouth, lungs, and ab-dominal organs. The invasion of the organism results in the formation of a hardnodule which slowly increases in size and infiltrates and destroys. Fig. 67.—Actinomycosis of the tongue, a. actinomyces granule; b and c, cellular nodules;d, transverse section of muscle; <• and /, connective tissue. (Ziegler.) adjacent tissues, whether these be soft tissues or hone. In the lungsthe lesions often resemble tuberculosis. Microscopically there areround cell infiltration, proliferation of connective tissue cells andformation of granulation tissue rich in leucocytes. Occasionallygiant cells appear. Later suppuration and necrosis result. Some-times repair processes proceed in one portion of the affected areawhile softening advances in another, causing considerable dis-figurement. Diagnostically the essential feature is the presence of the para-site itself, which is visible to the naked eye as a gray or yellowsulphur granule. These granules crushed between two glassslides are seen to be composed of one o
Size: 1830px × 1365px
Photo credit: © The Reading Room / Alamy / Afripics
License: Licensed
Model Released: No
Keywords: ., bookcentury1900, bookdecade1920, booksubjectpathology, bookyear19
